Scroll compressor

Patent metadata

Field	Value
Publication number	US-10428818-B2
Application number	US-201615388584-A
Country	US
Kind code	B2
Filing date	Dec 22, 2016
Priority date	Feb 24, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A scroll compressor according to the present invention includes a casing having a hermetic inner space divided into a low pressure portion and a high pressure portion, an orbiting scroll disposed within the inner space of the casing and performing an orbiting motion, a non-orbiting scroll forming a compression chamber together with the orbiting scroll, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber, a back pressure chamber assembly coupled to the non-orbiting scroll to form a back pressure chamber, a valve accommodation groove formed on at least one of the non-orbiting scroll or the back pressure chamber assembly, a bypass hole formed from the intermediate pressure chamber into the valve accommodation groove in a penetrating manner, a check valve accommodated in the valve accommodation groove and opening and closing the bypass hole according to pressure of the intermediate pressure chamber, a communication passage communicating the valve accommodation groove and the low pressure portion with each other, and a control valve selectively opening and closing the communication passage, whereby a facilitated fabrication, improved responsiveness and relaxed restriction for a specification of a valve can be achieved.

First claim

What is claimed is:

1. A scroll compressor, comprising:
a casing having a hermetic inner space that includes a low pressure portion and a high pressure portion;
an orbiting scroll disposed within the inner space of the casing, and the orbiting scroll to perform an orbiting motion;
a non-orbiting scroll, wherein the orbiting scroll and the non-orbiting scroll to form a compression chamber, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber;
a back pressure chamber assembly coupled to the non-orbiting scroll;
a valve accommodation groove provided on the back pressure chamber assembly;
a bypass hole provided from the intermediate pressure chamber to the valve accommodation groove;
a check valve at the valve accommodation groove, and the check valve to open or close the bypass hole based on pressure at the intermediate pressure chamber;
a communication passage between the valve accommodation groove and the low pressure portion of the casing;
a control valve to selectively open and close the communication passage; and
a communication pipe having a first end and a second end,
wherein the communication passage is coupled to the first end of the communication pipe that extends into the inner space of the casing, and the second end of the communication pipe that extends through the non-orbiting scroll, and wherein the control valve is disposed at the second end of the communication pipe, and
wherein the control valve is fixed to a lower surface of a main frame facing a driving motor.

2. The compressor of claim 1 , wherein the bypass hole includes a plurality of bypass holes spaced apart from each other, and wherein the check valve includes a plurality of check valves to open and close the plurality of bypass holes, respectively.

3. The compressor of claim 2 , wherein the valve accommodation groove includes a plurality of valve accommodation groove, wherein the plurality of check valves to be provided in the plurality of valve accommodation grooves, respectively, and wherein a communication groove is provided between two of the plurality of valve accommodation grooves to communicate between the two of the plurality of valve accommodation grooves.

4. The compressor of claim 1 , wherein the control valve is electrically connected to a terminal mounted at the casing.

5. The compressor of claim 1 , wherein the non-orbiting scroll is to move up and down with respect to the orbiting scroll, wherein the communication pipe includes a plurality of communication pipes, and a connection member is coupled between two of the plurality of communication pipes, and wherein the connection member is slidably coupled to a portion of a first one of the communication pipes.

6. The compressor of claim 5 , comprising a sealing member provided between an inner surface of the connection member and an outer surface of the communication pipe.

7. A scroll compressor, comprising:
a casing;
a high/low pressure dividing plate attached to an inner space of the casing to separate the inner space of the casing into a low pressure portion and a high pressure portion;
a main frame spaced from the high/low pressure dividing plate;
an orbiting scroll at the main frame to perform an orbiting motion;
a non-orbiting scroll to move up and down with respect to the orbiting scroll, and the non-orbiting scroll to form, along with the orbiting scroll, a suction chamber, an intermediate pressure chamber and a discharge chamber;
a back pressure plate coupled to the non-orbiting scroll by a plurality of bolts, and the back pressure plate having a space portion to communicate with the intermediate pressure chamber and having an open surface to face the high/low pressure dividing plate; and
a floating plate movably coupled to the back pressure plate to hermetically seal the space portion and form a back pressure chamber, wherein the non-orbiting scroll includes:
a plurality of bypass holes formed from the intermediate pressure chamber to a surface of the non-orbiting scroll facing the back pressure plate, and
check valves at the surface of the non-orbiting scroll for opening and closing the bypass holes, respectively,
wherein a communication groove is provided on at least one of the surface of the non-orbiting scroll or a surface of the back pressure plate corresponding to the surface of the non-orbiting scroll,
wherein a discharge hole to communicate between the communication groove and the low pressure portion is provided at one of the non-orbiting scroll or the back pressure plate,
wherein a control valve to communicate between the intermediate pressure chamber and the low pressure portion of the casing,
wherein a communication pipe is coupled between the discharge hole and the control valve, wherein the discharge hole is coupled to a first end of the communication pipe that extends toward the low pressure portion of the casing, and a second end of the communication pipe extends through the main frame, and wherein the control valve is disposed at the second end of the communication pipe, and the control valve is fixed to a lower surface of the main frame facing a driving motor.

8. The compressor of claim 7 , wherein the control valve is coupled to a member with the discharge hole of the non-orbiting scroll or the back pressure plate.

Assignees

• Lg Electronics Inc

Inventors

• Jin Honggyun
• Joo Sangwoo

Classifications

• F04C29/126

  of the non-return type · CPC title

• F04C18/0261

  Details of the ports, e.g. location, number, geometry · CPC title

• F04C27/00

  Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids · CPC title

• F04C23/008 Primary

  Hermetic pumps · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title